>>5500> as a kind of feeder system to metro and local rail stations and doesn't reach all the way to the city center.
Well mostly yes, although I wouldn't compare it to bus as the tram is usually more "mainline" service having an advantage of more capacity and speed due to many tracks being isolated from traffic, you could say tram in Moscow is more than a simple streetcar but still less than a full-fledged LRT. There is one line in the city center though and SPB has plenty of them.
> That there was a some sort of wye reversing going on at the bigger network, Lesnaya street?
I said, it was a reversing headshunt
. Why else would you think Moscow required the Tatra-based double-sided MTTA-2 trams working in back-to-back pairs for? Pic related, you can clearly see the doors on the "wrong" side, though here it is already separated and passed to Krasnopresnenskoe depot.
> But, if the networks were re-connected, it would happen through Leningrad ave?
Dude, it makes me really uncomfortable that you're putting it like it never gonna happen. Like you know something I don't. There was an official announcement on the very high level that until 2020 both Moscow tram networks will
be re-connected. It will be fully historically new route from Ostankino loop of the Central network through Timiryazevskaya and to the Dmitrovskaya loop (on the pic related) of the Krasnopresnenskaya (smaller) network, most likely with this routing, SEE THE LINK https://goo.gl/WW7nx9
What is more interesting it is planned as a compensation for the Moscow Monorail which should be disassembled by that time, which makes sense as its integration to the transport network is close to zero and the dedicated tram line would be like 500x more convenient mean of getting around the place.